Draft-gear.



. PRIEBE.

DRAFT GEAR. APPLICATION HLE'D MAR. 8, m.

Patented Dec. 12, 1916.

- To all whom it mag concern:

' incense.

Original application filed August 27, 1914, Serial No. 853,854. Divided and 1915. Serial No. 12,724.

v and exact HERMAN C. PRIEBE, OF BLUE ISLAND, ILLINOIS.

DRAFT-GEAR.

' to the accompany ng drawings, forming a the present application part of this specification.

y invention relates to draft gears employed in the construction of railroad cars, being a division of my original application Serial No. 858,854, filed August 27, 1914 he springport ions of my improved draft I will explain my invention more fully by reference to the accompanying drawin showing the preferred embodiment thereof and in which- Figure 1 is a longitudinal sectional elevation of a portion of a car structure illustrating a draft gear that includes one form of the invention; Fig. 2-is a view on line 2 2 of Fig. l; and Fig. 3 is a view on line 3 3 of iike parts are indicated by similar characters of reference throughout the difie'rent figures.

The outer ends of the draft arms 11, 12 are arranged to support the draft rigging, the type of draft rigging illustrated including some features of construction which are set forth and claimed in my co-pending application Serial No. 800,442, filed November 12, 1913. Each draft rigging is shown as including a coupler shank 28 whose inner end is provided with pockets which receive the short sides of hooks 29 in which a coupler yoke 30 terminates, pending application.

Keys 31 extend transversely through the draft arms and are rigid with respect to followers 32, 33 through which these keys also pass, the front follower 32 being engaged by the inner end of the coupler shank follower 33 is engaged by the inner end of the yoke 30. The slots 34c through which the keys 31 pass are longer than the wldth of the keys so that each key is movement longitudinally of the car. Spring Specification of Letters Patent.

as set forth in my co-' while the rear or inner capable of bodily .arnnr orrrc.

Patented Dec. 12, 1916. this application filed March 8,

carriers 35 are provided with slots 36 coextensive in length and alined 3.4L. of the carriers keys 31. Two sets of coil vene between the followers are provided with insetting ter the bores of the, springs the same. the elongated slots with the slots Coil springs 37 surround the portions 35 that intervene between the springs 38 interand 33 which lugs 39 that en- 38 to position The keys 31, by passing through 34, not onl y take part in supporting the followers and the springs which tend to force the followers apart but also have supporting engagement wlth the draft arms that also thus constitute draft gear carrier irons. The draft function of the draft arms is by the plate 40 which is coupler shanks that bear as the shanks oscillated.

gear carrying supplemented bolted beneath the upon these plates are moved in and out and are I increase the capacity of the springs that are operatively interposed be lowers 32 and 33 and. reduce tween the folthe lateraldimensions of the space occupied by these springs by making the bores elliptical with the 11121.]01' aXe of the springs s of the bores of the outer springs 37 vertically disposed.

between each pair of draft a mterpose tn 0 springs rms which together are of. greater capacity than any single spring could. be which has a cylindrical bore, for a given length the inner springs '38 IIlZtJOl axes of their of spring, and while preferably have the bores upright I do not wish to be limited to this arrangement; The bores of the outer springs 37 should have their major axes upright in o rder to enable me to increase the capacity of these sprin s for a given length of ing moments exerted springs having elliptical than the bending moments of cylindrical springsof similar capacity since the springs having elliptical bores exert their pressure the keys 31. The bendthereupon by the bores would be less upon the key at more closely approximated 3 points than would the I haveillustrated one space of peculiar limitations. that the spring feature of my;

cylindrical springs. peculiar arrangement It is obvious invention may be employed where other spacing limitations are encountered in connectio 11 with which springs in I springs having elliptical bores could be used to secure an increase of spring capacity that could not be obtained with the cylindrical springs hitherto employed. The outer springs 37, by being constructed as illustrated most clearly in Fig. 3, enable me to make the keys 31 shorter and in order that these springs may underlie the center sills as closely as possible the outer edges of the wings 19 are upwardly deflected and set into the center sills 2 as indicated in Fig. 3.

While I have herein shown and particularly described the preferred embodiment of my inventlon I do not wish to be limited to the precise details of construction shown as changes may be readily made without departing from the spirit of my invention, but

Having thus described my invention 1 claim as new and desire to secure by Letters Patent the following 1. A draft gear including the followers thereof; a yoke structure cooperating wit the followers; and a pair of,- coil springs located side by side between the sides of the yoke structure and interposed between these followers; the bores of these coil springs being elliptical.

2. A draft gear including the followers thereof; a yoke structure cooperating with the followers; and a pair of coil springs located side by side between the sides of the yoke structure and interposed betweenthese followers, the boresof these coil s rings being elliptical, the major axes of tiese bores being disposed upright.

'3. A draft gear including the followers thereof; transversely extending keys movable longitudinally of the gear and engaging the followers; and coil springs interposed between said keys, the bores of the springs being elliptical with the major axes of the bores upright.

In witness whereof, I hereunto subscribe no name this thirty-first day of October, A. D. 1914:.

HERMAN o. PRIEBE,

Witnesses:

ETTA L. WHITE, G. L. Cease. 

